This process works for any metal pencil box. Here is my homemade Studio Set of Cotman colors (all 40... well... all 37 I could buy locally... still w...
There are many Altoids Tin Pocket Watercolor Paint sets out there in Instructibles Land... and for those, I think you all. But I wanted something a little more adaptable and conformed to some artists' standards. I am a big fan of 1/2-Pan watercolors by Winsor & Newton, VanGogh, and other paint companies. I love my Winsor & Newton field set, but wanted something a little smaller. W&N's pocket set is nice but a little too spartan. So, after reading many of the Instructibles here, I set off to make an Altoid tin watercolor set based on artists's 1/2-Pans and with interchangeable parts. On with the show...
Step 1: The pans
First, I needed some 1/2-pans. My local store did not carry empty ones. You COULD do this project with filled 1/2-pans from your favorite manufacturer... I suggest Winsor & Newton's COTMAN line for the price verses quality... but other lines are good too. All the following steps would be the same for factory filled pans (except for the "filling" stage... that would be... well... silly).
Step 2: The Tin
Of course you need a clean Tin. Altoids is not common here in Taiwan... but my family sends me a few in the mail. I have also used this project with metal pencil boxes. Metal construction is the key to this particular project.
Step 3: The Magnets
You will also need some thin, self-adhesive craft magnets. These can be had many places. I found mine at the Dollar Store for about... let me find that receipt... oh! It was a Dollar.
Step 4: The Sticky
Now we are going to glue these (with the self-adhesive on the magnet) to the bottoms of some 1/2-pans. Press them on firmly. You MAY need to cut the magnets to fit, as I did. Normal craft scissors should do the trick.
Step 5: The Paint
Fill the pans with your choice of paint. I wanted Winsor & Newton Artist's Grade... but my checkbook said Winsor & Newton's Cotman student's grade. Still Cotman's student grade (as well as VanGogh and Rembrandt) is still a world above many company's artists' grade colors. Your milage may vary.